On a red field, a white equilateral cross whose arms are one sixth
longer than their width. The relationship between the span of the
cross and the width of the flag has not been established, but in
practice the ratio is about 2:3 or 7:10.

The relative dimensions of the cross are defined in Article 1 of Federal Order #111 on the arms of the Helvetic Confederation (12 December 1889).

Unlike most flags of the world, the Swiss flag is square. This was an issue when Switzerland joined the UN in 2002, as all the flags displayed on UN Plaza should have the same size. The UN first had a rectangular flag, but the Swiss mission protested. Eventually the UN accepted a Swiss square flag. But, in order to have a flag that is not too small, the flag displayed on UN Plaza has the same area of a rectangular flag.
Pascal Gross

The ratio between of the cross span to the flag width is not established by law, but these two layouts show how common practice may have changed over time. The flag on the left (from Album 2000 [pay00]) has a ratio of 20÷32=62.5%, while the flag on the right (from Flaggenbuch 1939 [neu39]) has a ratio of 80÷110=72.7%. In both cases, the 6:7 ratio specified in 1889 that defines the relative dimensions of the white cross is retained.

The divisions along an edge of the 2000 version (6-7-6-7-6) are the same as those along the shorter axis of the Swiss naval ensign, whose construction details were set by law in 1953.
Željko Heimer, 30 January 2003

The protocol manual for the London 2012 Olympics (Flags
and Anthems Manual London 2012) provides recommendations for national flag
designs. Each NOC was sent an image of the flag, including the PMS shades, for
their approval by LOCOG. Once this was obtained, LOCOG produced a 60 x 90 cm
version of the flag for further approval. So, while these specs may not be the
official, government, version of each flag, they are certainly what the NOC
believed the flag to be. For Switzerland: PMS 485 red. The vertical flag is
simply the horizontal version turned 90 degrees clockwise (in 3:5 / 5:3 format,
of course, like all Olympic flags).Ian Sumner, 10 October 2012

The Swiss cross on a red field ultimately derives from a similar
banner of the Holy Roman Empire, and thus has strong Christian
connotations. The Swiss flag traditionally stands for freedom, honour
and fidelity. (The motto "Honor et Fidelitas" was inscribed on the
cross of several Swiss mercenary flags of the 18th century.) In
modern times, through association with consistent Swiss policy, the
flag has also come to denote neutrality, democracy, peace and refuge.

While Swiss independence and democracy traditionally dates from 1291,
people are often surprised to learn that the national flag in its
current form dates only from 1889. Modern variations of the flag can
be said to go back to 1815, and the original Confederate white cross
on a red field dates from the 15th century. Its inspiration perhaps
goes back to the 4th century.

Some have postulated that the Swiss flag owes its origin to the
vexillum of the Theban Legion of the ancient Roman empire, but any
such connection is pretty tenuous. In 302 Mauritius and his Christian
legionnaires were executed in Valais for refusing to sacrifice to the
Emperor and suppress the local Christians. Long after his death St.
Maurice was granted arms of a white cross bottony on a red field
(symbolising the shed blood of the legion's martyrs), and the arms of
his namesake city (whose monastery was founded in 515) consist of the
same cross on a field per pale azure and gules (see relative page).
The arms of Sts. Victor and Ursus, patron saints of Geneva and Solothurn and
officers of the Theban Legion, also feature the white cross bottony.
(Medieval iconography sometimes depicts St. Maurice's flag and arms as
a red cross on a white field, very similar to St. George's.)

Most of the Swiss cantons first earned sovereignty within the Holy
Roman Empire, and were granted their banners by the Emperor. Later
they banded together in a Confederation which grew from three
members in 1291 to thirteen in 1513. By the Peace of Basel in 1499
ending the Swabian War, the Swiss threw off the last vestiges of
imperial obligations, and their full independence was recognised in
1648 by the Treaty of Westphalia ending the Thirty Years' War (a war
in which the Swiss actually had no part).

The Holy Roman Empire had three banners. The personal banner of the
emperor was a black eagle on a yellow field (the eagle evoking
continuity with ancient Rome), and these colours can be seen as the
inspiration for several cantons (Uri, Bern, Schaffhausen, Geneva).
The flag of the Empire was a white cross extending to the edges of a
red field, and symbolised the Emperor's role as the protector of
Christianity. This eventually became the Empire's war flag, and
inspired many other flags in the German and Italian states. A third
plain red banner (Blutbann) was displayed when the Emperor
administered justice, and thus symbolised his power over life and
death. During investitures of vassals, the Emperor granted this flag
as a sign that they were empowered to exercise life-and-death justice
in the name of the Emperor. When the Emperor granted sovereignty to a
city-state, a red flag -- sometimes with white cross -- signified
freedom and independence from all temporal powers other than the
emperor. This influence can be seen in the flags of Unterwalden,
Solothurn, and most notably Schwyz. The Schwyz flag was originally
an unadorned red banner, and the assumption that the modern Swiss
flag derives from it is incorrect since the Swiss cross was in use by
the Confederation about a century before Schwyz added it to its
flag.

Some cantonal war flags bore a schwenkel, or long pennant, usually
granted by the Emperor as a symbol of sovereignty and high rank within
the empire. Zurich's in particular is significant since it was red
with a small white cross near the hoist (derived from the imperial
banner). This schwenkel was granted in 1273, and Zurich eventually
became the most powerful member of the Swiss Confederation, with her
military commander holding supreme command over Confederate forces.
The schwenkel may have influenced the development of the Swiss cross,
but it would be a mistake to assume that other cantons had a red
schwenkel or that Zurich's signified its membership in the Swiss
alliance.

While the cantons of the Swiss Confederation went to war flying
their individual banners, they soon recognised the need for a common
recognition sign, and as early as 1339 at the battle of Laupen,
troops wore a long-armed narrow white linen cross stitched on their
breasts, sleeves and thighs. Soon afterwards, cantonal detachment
started putting this white cross on their cantonal banners. Besides
its familiar bear flag, powerful Bern had a red over black guidon,
and white cross on the red part of their banner became a major sign
of recognition. At the battle of Arbedo in 1422 and quite regularly
thereafter, mixed levies from more than one Canton carried red
triangular guidons with a white cross (see image). The last time this
triangular guidon appeared in battle was in 1540, by which time it
was already evolving into a full four-sided flag. All these uses of
the Confederate cross became increasingly important since
Confederation armies were likely to meet other Swiss mercenary troops
in the employ of enemies. But 1540 was also the last time a Swiss
confederate army was called out until the French invasion of 1798, so
the white cross on a red field disappeared from use. The
Confederation remained the loosest and most decentralised of
governments, and while it had no flag there remained a state seal
recognised throughout Europe as the insignia of the Thirteen Cantons.
It was a white cross "traversante" on a red shield, and it came to
be known in Switzerland as the "federal cross".

Swiss prowess on the battlefield put them in high demand as
mercenaries. The Swiss signed "capitulations" with other countries,
enlisting whole regiments of mercenaries. Many of these regiments in
the 17th and 18th centuries, especially those in French service,
carried flags with the white cross traversante. The quarters created
by this cross were not red, but rather filled with all sorts of
devices -- usually "flames" in the colours of the colonel's arms.

In many ways Switzerland entered the modern era when the French
overthrew the flag-less Swiss Confederation in 1798. Switzerland had
recalled its French regiments in 1792 when the Swiss Guard was
massacred in Paris, but they were disarray six years later, and only
Bern resisted the invasion. When France imposed the Helvetic Republic
on the Swiss in 1798, they also recruited a Helvetic Legion of four
regiments to fight France's wars. While the regiments carried flags
with an image of William Tell -- the seal of the Republic -- these
flags bore no resemblance to previous Swiss iconography. When the
regiments returned home after the fall of Napoleon they became border
troops, and the restored Swiss Confederation in 1815 presented each of
them with an honorary flag (see image). These flags were an important development
in that they represented the first prototype of a modern federal flag.
They consisted of a long narrow white cross, couped near the edges of
the flag, on a red field. This cross was essentially the
centuries-old "confederate" cross, but in its slightly truncated form
it prefigured the forthcoming federal cross. Spanning the vertical
arms of the cross was a sword wrapped in a laurel vine. The obverse
of the horizontal arms featured the motto "Fu"r Vaterland und Ehre"
(For Fatherland and Honour) while the reverse contained the text
"Schweizerische Eidgenosschenschaft" (Swiss Confederation).

The cantons remained all-powerful and raised their own armies, but
since they had their own varied flags and uniforms, a federal armband
consisting of a short white cross on a red field was introduced for
all troops. This 1815 armband was in effect the precursor of the
stocky white cross which would soon appear on the federal flag.
Also in 1815 the government of the restored Confederation designed a
state seal consisting of the short white cross on a red shield and
surrounded by the arms of the twenty-two cantons. (Thus the seal
also necessarily "finalised" the form of the cantonal arms.) The
cross on the pre-1798 seal had extended to the edges of the shield.

General Henri-Guillaume Dufour, charged with training a small
federal cadre of troops in 1817, simultaneously championed the idea
of a federal flag for Switzerland. He argued that cantons flying the
same flag were more likely to feel fraternity and come to each
other's aid in times of crisis (which they had failed to do in 1798).
This flag (see image) first flew at nationwide military maneuvers in 1821, and
gradually caught the popular imagination. It appears to have been in
fairly widespread unofficial use by the 1830s. In 1833 Aargau -- one
of the new cantons created in 1803 -- scrapped its cantonal war flag
in favour of the new federal flag. Other cantons, especially the
older ones, resisted surrendering centuries of history to this new
federal identity. In 1840 the Diet ruled that the federal flag would
replace cantonal war flags for all of Switzerland's armed forces.
This flag went to war for the first and only time with Dufour's
federal army as it suppressed the Sonderbund forces in the short
civil war of 1847. The federal flag consisted of a stocky white
cross, made up of five equal squares on a red field. This
transformation of the old Confederate cross was probably adopted to
avoid confusion with Savoy. The flag was enshrined in the
Constitution of 1848, which in effect transformed Switzerland from a
loose Confederation into a unitary federal state. So well did it
catch on that when the Constitution was rewritten in 1874 no further
mention was made of a federal flag.

While it took several decades to adopt the now familiar federal flag,
it took a few more to refine it. It was widely criticized as being
ugly, and beginning in 1880 a sometimes vehement debate broke out in
the press. Finally in 1889 the Federal Assembly ruled that
Switzerland was keeping its white cross, but that it would be changed
from the five equal squares to one in which the arms were one sixth
longer than they were wide. This last change in the flag actually
brought it into conformity with the cross on the state seal of 1815.

It is evident from its history that the Swiss national flag evolved
from war flags, which is why it is square. That distinction among
the world's nations is shared only with the Vatican, which is
ironically the only state for which Switzerland still permits
mercenary service.

Switzerland has no Presidential flag, but during national crises the
Federal Assembly appoints an overall commanding general with
extraordinary emergency powers. As a sign of this authority, the
general receives a special standard. It is an unadorned national flag
with red and white fringe, identical to a cavalry guidon. The last
such flag was carried by General Henri Guisan during the mobilisation
of 1939-1945.T.F. Mills, 14 November 1997

Another postulated explanation for the origin of the Swiss flag is that during the resistance against the Austrians, the early Swiss (mostly peasants in arms) used to stitch two stripes of white fabrics on their clothes to recognize each other during combat. From this, the white cross became the symbol of the Swiss. The red color (imperial color) came later, as it was "granted" by the Austrian Emperor.Jacques F. Baud, 7 December 2002

On the 21st of June 2013, the Swiss parliament adopted the project Swissness
that consists of two laws: the Law on the protection of trademarks (French:
Loi sur la protection des marques) and the Law on the Protection of the coat of
arms of Switzerland and other public signs (Loi sur la protection des armoiries
de la Suisse et autres signes publics).

That second Law was accepted
almost unanimously and replaced the Federal Law of 5th June 1931 for the
protection of public coat of arms and other public signs (French: la loi
fédérale du 5 juin 1931 pour la protection des armoiries publiques et autres
signes publics) and the Federal Decree of 12th December 1889 concerning the
coat of arms of the Swiss Confederation (French: Arrêté fédéral du 12
décembre 1889 concernant les armoiries de la Confédération suisse).

The proportions of
the flag 1:1(or 32:32, that is 6-7-6-7-6 : 6-7-6-7-6), where the cross in
the middle has arms with width = 6 and length=7.

The article 5 says that
the coats of arms, flags and other emblems of cantons, districts, circles and
communes are fixed by cantonal Law.

The article 8 speaks about the use of
the coats of arms (Swiss, cantons, etc.)

The article 10 says that flags
and other emblems of the Confederation, flags and other emblems of the
cantons, districts, circles and communes and signs that may be confused with
them can be used, unless their use is (a) misleading, or (b) contrary to
public order, morality or law.

Armorial bearings, flags and other emblems
of other foreign governments, including municipalities, may be used unless their
use is (a) misleading, or (b) contrary to
public order, morality or law.

There are other dispositions in the law.

That law gives also
some precisions concerning the Swiss ensign in the Federal Law of 23rd
September 1953 on maritime navigation under the Swiss ensign (French: Loi
fédérale du 23 septembre 1953 sur la navigation maritime sous pavillon suisse):

The annex I of the law is binding for the shape, the colours and the
proportions.

Federal Law from 5 June 1931 protects the federal cross, the arms and
the Swiss flag against "any abusive use". Penalties are possible, but
the law is usually enforced with flexibility. The most important point
is "not to offend the Swiss emblems" (Swiss penal code, article #70).
During the April 1998 session, the national Council investigated a
petition asking to mention explicitly the cross and the flag in the
first article of the Constitution as "the highest symbols of the
country". The Commission for revision of the federal Constitution did
not follow up because neither a political party nor an organisation had
requested the modification.
Ivan Sache, 20 September 2000

The public damaging of private flags is not culpable in Switzerland (i.e. everyone has the right to destroy a flag or any other object, so long as it is one's own). However all emblems (esp. flags and
coats of arms) that have been put up by an authority are protected by federal law. Stealing, damaging and insulting acts against them are penalized with prison or fine. The same applies to official emblems of foreign countries. The extent of the sentence is not specified by federal law because in case of an offence, the respective cantonal authorities determine it individually.
Martin Karner, 9 April 2004

In regards to protection of the Swiss flag from commercial misuses, there are
additional laws to protect it from misuse in relation to the Red Cross symbol.
According to: "Model law concerning the use and protection of the emblem of the
Red Cross or Red Crescent" (31-08-1996 International Review of the Red Cross no
313, p.486-495 or
http://www.icrc.org/web/eng/siteeng0nsf/iwpList276/D8ADD0310BB766F4C1256B66005A2611),
Section III, Article 12 reads, "Owing to the confusion which may arise between
the arms of Switzerland and the emblem of the red cross, the use of the white
cross on a red ground or of any other sign constituting an imitation thereof,
whether as a trademark or commercial mark or as a component of such marks, or
for a purpose contrary to fair trade, or in circumstances likely to wound Swiss
national sentiment, is likewise prohibited at all times; offenders shall be
punished by payment of a fine of... (amount in local currency)."Orville
Eastland, 19 January 2005

Switzerland is embroiled in
controversy over the commercial use of the flag, and confusion over
its legal use. It is legal to use the Swiss flag for decoration and
publicity, but its use is also regulated by the Society for the
Promotion of Swiss Products and Services, better known as "Swiss
Label". A 1931 law, which many now consider a useless relic,
prohibits the use of the federal cross on any product not so licensed
by the Society. To qualify a product must be more than 50%
manufactured in Switzerland. Many products, like most Swiss
chocolate, no longer qualify and yet continue to illegally use the
federal cross. The Society sees this as deception in advertising,
since foreign consumers have come to trust products that are
Swiss-made. A recent poll shows that most Swiss are aware of the
law, but the law is widely flaunted with impunity.

The only genuine Swiss Army Knives are Victorinox and Wenger, but
there are many fakes bearing the Swiss cross. The Swiss Army was
originally issued with German knives from the famous blade maker
Solingen. Victorinox started making knives in Switzerland in 1891.
These were issued to soldiers, but officers bought their own
lighter, more elegant models. Victorinox made its first
Offiziersmesser (officers' knife) in 1897, and in 1945-49 massive
deliveries were made to the US armed services. Americans couldn't
pronounce the word, so they became simply known as "Swiss Army
knives", and that was the origin of its worldwide fame. In a twist
of irony, Victorinox since 1976 has supplied the German Army with
its pocket knife, but it is olive green and features a German eagle
instead of the Swiss cross. Real Swiss officers' knives are
aluminium-cased. The familiar red ones are for civilians and
export. And if it doesn't say Victorinox or Wenger on the blade,
you might have a piece of American or Chinese junk -- the Swiss cross
is no guarantee.T.F. Mills, 09 March 1998

Aleksandar Nemet noted photographs of the Swiss flag with flames along one
edge at:
http://www.inmagine.com/dvs146/dvs146445-photo and
http://www.pbase.com/ebrucem30/image/49103133. This is a decorative Swiss
national flag, which is (as far as I know) only hoisted on a bridge in Geneva
city. On this bridge all the flags fly together with the Swiss flag for a mere
decorative purpose. All these flags on this specific bridge over the Rhodan
river, at the outflow from Geneva Lake, show a special pattern, which consists
of little flames along one or more borders of the flag. Flames, though also
sometimes seen in 17th and 18th century military flags all across Europe, are a
specific Swiss flag design element since the 17th century until today. Flames
may be placed across the flag or in the four areas separated by a white cross in
varied ways, or at the edges of a flag or at the edges of a cross, or in any
other possible way (like for instance in our case here).Emil Dreyer,
21 November 2008

Flaggen, Knatterfahnen and Livery Colours

images by Pascal Gross

Flaggen are vertically hoisted from a crossbar in the manner of gonfanon, in ratio of about 2:9, with a swallowtail that indents about 2 units. The chief, or hoist (square part) usually incorporates the design from the coat of arms - not from the flag. The fly part is always divided lengthwise, usually in a bicolour, triband or tricolour pattern (except Schwyz which is monocolour, and Glarus which has four stripes of unequal width). The colours chosen for the fly end are usually the main colours of the coat of arms, but the choice is not always straight forward.

Knatterfahnen are similar to Flaggen, but hoisted from the long side and have no swallow tail. They normally show the national, cantonal or communal flag in their chiefs.
Željko Heimer, 16 July 2000